//-->
Betrachtungen und Forderungen der Fürsorgepraxis zur Neuregelung
Jellinghaus, Karl, (1950)
An agricultural and socio-economic survey of South Sudan refugee settlements and surrounding areas in Gambles Awraja, Ethiopia
Ellman, Antony O., (1972)
Third-country nationals and the Euroepan coordination of social security
Carnelissen, Rob, (2009)